Syringe hydrometer



April 7, 1931. EDELMANN SYR TNGE HYDROMETFR Filed July 17, 1925 PatentedApr. 7, 1931 PATENT OFFICE UNITED STATES LEO EDELMANN, OF CHICAGO,ILLINOIS, ASSIGNOR T0 E. EDELMANN 8t 00., OF CHICAGO, ILLINOIS, A.CORPORATION OF ILLINOIS SYBINGE HYDROMETER Application filed July 17,1925. Serial No. 44,306.

This invention relates to syringe hydrometers, and particularly to ahydrometer of this character having a glass or other frangible barrelcontaining the float.

An object of this invention is to provide a syringe hydrometer of fewparts and which can be readily assembled.

' Another object is to so construct the hydrometer that the frangibleportions are protected against breakage through dropping or other shocksencountered in use.

With I these and other ob ects in view which will be apparent to thoseskilled in the art, this invention embraces novel features ofconstruction and combination of parts which will be set forth inconnection with the drawing.

In the drawing:

Figure 1 is a longitudinal sectional view through a hydrometer embodyingthis in vention.

Fig. 2 is a view in side elevation of the hydrometer.

Fig. 3 is a transverse sectional view on the line 33 of Fig. 1.

Fig. 4 shows a slightly modified construction.

In the present instance I have illustrated my invention embodied with ahydrometer structure of the type shown in Patent N 0. 1,262,478, grantedto F. L. Freas, but it is to be understood that this invention is alsoadaptable to other types of syringe hydrometers.

The barrel 1, as illustrated in Figs. 1 to 3, is in the form of a glasstube having beads 2 and 3 around its ends. The extension housing 4 has aspout 5 at one end thereand a guard or protective housing 8 is madeintegral with the extension housing 4 and is adapted to fit around thefrangible bar- 'rel 1, a syringe bulb 9 being carried at the remainingend of this guard or protective housing 8. The protective housing 8 iscut away at its sides as at 10 and 11 to permit a clear view of thehydrometer float 12, and an annular groove 13 is provided adjacent thesyringe bulb 9 to receive the beaded end 2 of the barrel 1.

In assembling this structure the barrel 1 is fitted through one of theside openings at 10 orl1, and the guard housing structure is stretchedsufficiently to accommodate the length of the barrel 1, the naturalresiliency of the material causing the parts to return to a position inwhich the beaded ends of the barrel 1 arereceived and are firmly held inthe grooves 6 and 13 to establish air and liquid tight connections atthese points.

A buffer plug 14 is fitted in the end of the barrel 1 adjacent the bulb9 and is provided with openings, this buffer being adapted to limitmovement of the float 12 within the barrel. The hydrometer float 12 hasits float end- 15 made of a diameter to fit loosely within the extensionhousing 4, and the gauge stem 16 is of the same or of a reduceddiameter. A plurality of guide and centering ar1ns'17 are provided onthe upper p01 tion of the float end 15, and these guide arms projectradially their extent diametrically being slightly less than theinternal diameter of the barrel 1. The guide arms 17 serve to hold andmaintain the hydrometer float 12 in -a substantially axial positionwithin the barrel 1, and also serve as stops resting upon the cushionflange 7 of the extension housing 4 to maintain the hydrometer float 12in a position where the passage of the spout 5 is entirely free and openat its inner end, this support upon the shoulder 7 also serving toprotect the hydrometer float and afford a cushion to prevent injury ofthe same due to dropping or other shocks while the instrument is in use.

Although I have here shown two openings at 10 and 11, in someadaptations it may be found desirable to provide a single opening, whileother constructions may require three or more openings. 1 i

In the disclosure in the modified construction as shown in Fig. 4, theguard housing 8 is formed as an integral portion of the extensionhousing 4 and the syringe bulb 9 is a separate portion. Thisconstruction maybe found advantageous for use where. the upper end" ofthe barrel 1 is reduced in diameter and the bulb 9' is corres ondinglyreduced. Also, the construction 0 the partsv might be reversed and theguard housin might be formed integral with the syringe bulb and theextension housing or spout might be then made as a separate portion.

While I have shown and described only certain specific embodiments ofthis invention and have suggested only certain possiblemodifications, itwill be appreciated that this" invention is susceptible to a numberofadaptations, and that changes and variations can be made in the form,construction and arrangement of the parts withoutdeparting from thespirit and scope of my invention.

I claim: 7 1 a I 1;. A; syringe hydrometer comprising a frangiblebar-rel,- a cushion rubber. end portion; to receive one end of thebarrel and provided with aliquidspout,a second end portion in the formof; a syringe bulb to frangible barrel provided with a liquid spout atits extremity and having a cushion shoulder presented within the end ofthe barrel, a hydrometer float movable within the barrel and housing andprovided with extensions to engage with the shoulder and afford acushion support-for the float, guard housing integral with the housingand embracing the body portion of the frangible barrehand a 557i g bulbintegral with the han ing: adapted to receive the remaining end of thefrangible housing, said guard housing having an opening through the sidethereof through which the frangible barrel is inserted and through whichi the float can be viewed.

, 5 A syringe hydrometer comprising a frangible barrel, an endportijonof soft rubher to receive oneeiidof the barrelprovided with a liquidspout; a syringe bulb" of soft rubber adapted to receive the remainingend of the barrel, and a guard housing portion intermediate integralwith the end portion and the syringe to embrace and protect the middleportion of the frangible barrel, saidguardhousing having an elongatedopening. therein throughwhi ch the frangible barrel can be insertedinassembling the hydrometer.

, Intestimony whereof I? hereunto aflix my signature. m I M LEOEDELMANN:

housing with asheulder adjacent the barrel,

a hydrorneter float movable within the barrel and housing and havingvportions to engage with thefshoulder and afford a cushion support forthe fio'at and a guard housing ofnon-frangible cushion material aroundthebarrel between the end portions and provided with openings throughwhich the float can be viewed;

3. A; syringe hydrometer comprising a frangible barrel, a housing ofnon-frangible cushion material to receive one endof the frangible barrelprovided with aliquid spout at its extremity and having a cushionshoulder presented-within the end of the barrel, a Hydrometer floatmovable within 7 the barrel and housing and providedwith extensions toengagewith the shoulder and afford a cushion support for the float, andaguard ,housing integralwith the housing and embracing the body portionof the frangible barrel.- 7

LA syringe hydrometer comprising, =a'- frangible barrel,= a housing ofnon-frangible cushion material to receive one end of the

